Tunnels – Greenhouses

Venting Systems

The quick and easy ability to vent and fully open Haygrove’s is perhaps their No.1 selling point. Growers can also start off with low cost manual venting and upgrade to electric automated roller roof vents later. All the technology can be retrofitted.

Met forecast(Air temperature, 1.5m)

°C

°F

Cloudy

Sun

Rain

Winterising/Chilling

Open all doors and vent high (or de-skin)

Closed

< 14

< 50

Tunnels can remain closed

Open doors(close at night)

Closed

14-20 D< 8 N

59-68 D< 46N

Tunnels can remain closed

Open doors. For tunnels > 100m, especially on flat land, window vent ten hoops every 50m. Close at night.

Closed

> 20 D< 8 N

> 68 D< 46 N

Open doors.Close at night.

Open doors. Vent lee-ward side of tunnels to stage 1. Close at night.

Closed if likely leaves will remain wet for < 10 hours or risk of wet fruit for picking.

> 20 D> 8 N

> 68 D> 46 N

Vent tunnels to stage 1

Vent tunnels to stage 2

Closed if likely leaves will remain wet for < 6 hours or risk of wet fruit for picking.

Closed if likely leaves will remain wet for < 2 hours or risk of wet fruit for picking.

D = Day Temp N = Night Temp

Venting the Haygrove Tunnels is simple – we recommend managing venting practice by deploying Stage 1 (1m or 3’3’’ open), Stage 2 (2m or 6’6’’) or Stage 3 (3m or 9’9’’) opened vents for different temperatures. Haygrove supply recommended venting charts for different crops, the example shown on the right is for Strawberries.